Feeling guilty..

My husband and I have been TTC for 4 years now and no such luck 😢 while everyone around me is getting pregnant and having their babies I can't help but to feel upset/mad/jealous.. My sister has 2 children that I adore with all my heart and for her its simple to conceive. She knows that I've been trying for baby #1 and she rubs it in my face that she has kids and will be having more.. I am all alone I have no one to talk to about this.. I can't say anything to my hubby because he just don't get it. Am I just over reacting? Just want to have that BFP and have that joy in our lives that we have been waiting for..